-30.36% is the change from 56 to 39
Calculation steps:
[( 39 - 56 ) ÷ 56] x 100 = -30.36%
Formula
Percentage change = [(39 - 56) / 56] x 100
Subtract the new number by the original number
39 - 56 = -17
-17 ÷ 56 = -0.30357142857142855
-0.30357142857142855 x 100 = -30.36%